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add text "An example of positive correlation would be the relationship between people's height and weight: taller people tend to be heavier. If we look at the average data for a large group of people, as height increases so does weight." (#21328) 

add text "An example of positive correlation would be the relationship between people's height and weight: taller people tend to be heavier. If we look at the average data for a large group of people, as height increases so does weight."
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Mike-Git-Hub 2018-11-09 22:49:44 +09:00 committed by Tom
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guide/english/mathematics/correlation/index.md
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@ -7,6 +7,7 @@ The correlation means how much one thing changes with another.
If there is a positive correlation between A and B, then as A increases, B increases.
If there is a negative correlation, then as A increases, B decreases (or the other way around).
If there is no correlation, then A does not affect B and vice versa.
An example of positive correlation would be the relationship between people's height and weight: taller people tend to be heavier. If we take the average data for a large group of people, as height increases so does weight.
![Correlations](http://www.statisticshowto.com/wp-content/uploads/2012/10/pearson-2-small.png)